/*      $OpenBSD: mediabay.c,v 1.9 2022/10/15 08:41:18 jsg Exp $        */
/*      $NetBSD: mediabay.c,v 1.9 2003/07/15 02:43:29 lukem Exp $       */

/*-
 * Copyright (C) 1999 Tsubai Masanari.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/systm.h>

#include <uvm/uvm_extern.h>

#include <dev/ofw/openfirm.h>

#include <machine/autoconf.h>
#include <machine/pio.h>

struct mediabay_softc {
        struct device sc_dev;
        int sc_node;
        u_int *sc_addr;
        u_int *sc_fcr;
        u_int sc_baseaddr;
        bus_space_tag_t sc_iot;
        bus_dma_tag_t sc_dmat;
        struct device *sc_content;
        struct proc *sc_kthread;
};

void mediabay_attach(struct device *, struct device *, void *);
int mediabay_match(struct device *, void *, void *);
int mediabay_print(void *, const char *);
void mediabay_attach_content(struct mediabay_softc *);
int mediabay_intr(void *);
void mediabay_create_kthread(void *);
void mediabay_kthread(void *);

const struct cfattach mediabay_ca = {
        sizeof(struct mediabay_softc), mediabay_match, mediabay_attach
};
struct cfdriver mediabay_cd = {
        NULL, "mediabay", DV_DULL
};


#ifdef MEDIABAY_DEBUG
# define DPRINTF printf
#else
# define DPRINTF while (0) printf
#endif

#define FCR_MEDIABAY_RESET      0x00000002
#define FCR_MEDIABAY_IDE_ENABLE 0x00000008
#define FCR_MEDIABAY_FD_ENABLE  0x00000010
#define FCR_MEDIABAY_ENABLE     0x00000080
#define FCR_MEDIABAY_CD_POWER   0x00800000

#define MEDIABAY_ID(x)          (((x) >> 12) & 0xf)
#define MEDIABAY_ID_FD          0
#define MEDIABAY_ID_CD          3
#define MEDIABAY_ID_NONE        7

int
mediabay_match(struct device *parent, void *v, void *aux)
{
        struct confargs *ca = aux;

        if (strcmp(ca->ca_name, "media-bay") == 0 &&
            ca->ca_nintr >= 4 && ca->ca_nreg >= 8)
                return 1;

        return 0;
}

/*
 * Attach all the sub-devices we can find
 */
void
mediabay_attach(struct device *parent, struct device *self, void *aux)
{
        struct mediabay_softc *sc = (struct mediabay_softc *)self;
        struct confargs *ca = aux;
        int irq, type;

        ca->ca_reg[0] += ca->ca_baseaddr;

        sc->sc_addr = mapiodev(ca->ca_reg[0], PAGE_SIZE);
        sc->sc_fcr = sc->sc_addr + 1;
        sc->sc_node = ca->ca_node;
        sc->sc_baseaddr = ca->ca_baseaddr;
        sc->sc_iot = ca->ca_iot;
        sc->sc_dmat = ca->ca_dmat;
        irq = ca->ca_intr[0];
        type = IST_LEVEL;

        if (ca->ca_nintr == 8 && ca->ca_intr[1] == 0)
                type = IST_EDGE;

        printf(" irq %d\n", irq);
        mac_intr_establish(parent, irq, type, IPL_BIO, mediabay_intr, sc,
            "mediabay");

        kthread_create_deferred(mediabay_create_kthread, sc);

        sc->sc_content = NULL;

        if (MEDIABAY_ID(in32rb(sc->sc_addr)) != MEDIABAY_ID_NONE)
                mediabay_attach_content(sc);
}

void
mediabay_attach_content(struct mediabay_softc *sc)
{
        int child;
        u_int fcr;
        struct device *content;
        struct confargs ca;
        u_int reg[20], intr[5];
        char name[32];

        fcr = in32rb(sc->sc_fcr);
        fcr |= FCR_MEDIABAY_ENABLE | FCR_MEDIABAY_RESET;
        out32rb(sc->sc_fcr, fcr);
        delay(50000);

        fcr &= ~FCR_MEDIABAY_RESET;
        out32rb(sc->sc_fcr, fcr);
        delay(50000);

        fcr |= FCR_MEDIABAY_IDE_ENABLE | FCR_MEDIABAY_CD_POWER;
        out32rb(sc->sc_fcr, fcr);
        delay(50000);

        for (child = OF_child(sc->sc_node); child; child = OF_peer(child)) {
                bzero(name, sizeof(name));
                if (OF_getprop(child, "name", name, sizeof(name)) == -1)
                        continue;
                ca.ca_name = name;
                ca.ca_node = child;
                ca.ca_baseaddr = sc->sc_baseaddr;
                ca.ca_iot = sc->sc_iot;
                ca.ca_dmat = sc->sc_dmat;

                ca.ca_nreg  = OF_getprop(child, "reg", reg, sizeof(reg));
                ca.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr,
                                sizeof(intr));
                if (ca.ca_nintr == -1)
                        ca.ca_nintr = OF_getprop(child, "interrupts", intr,
                                        sizeof(intr));
                ca.ca_reg = reg;
                ca.ca_intr = intr;

                content = config_found(&sc->sc_dev, &ca, mediabay_print);
                if (content) {
                        sc->sc_content = content;
                        return;
                }
        }

        /* No devices found.  Disable media-bay. */
        fcr &= ~(FCR_MEDIABAY_ENABLE | FCR_MEDIABAY_IDE_ENABLE |
                 FCR_MEDIABAY_CD_POWER | FCR_MEDIABAY_FD_ENABLE);
        out32rb(sc->sc_fcr, fcr);
}

int
mediabay_print(void *aux, const char *mediabay)
{
        struct confargs *ca = aux;

        if (mediabay == NULL && ca->ca_nreg > 0)
                printf(" offset 0x%x", ca->ca_reg[0]);

        return QUIET;
}

int
mediabay_intr(void *v)
{
        struct mediabay_softc *sc = v;

        wakeup(&sc->sc_kthread);
        return 1;
}

void
mediabay_create_kthread(void *v)
{
        struct mediabay_softc *sc = v;

        kthread_create(mediabay_kthread, sc, &sc->sc_kthread,
            sc->sc_dev.dv_xname);
}

void
mediabay_kthread(void *v)
{
        struct mediabay_softc *sc = v;
        u_int x, fcr;

sleep:
        tsleep_nsec(&sc->sc_kthread, PRIBIO, "mbayev", INFSLP);

        /* sleep 0.25 sec */
        tsleep_nsec(mediabay_kthread, PRIBIO, "mbayev", MSEC_TO_NSEC(250));

        DPRINTF("%s: ", sc->sc_dev.dv_xname);
        x = in32rb(sc->sc_addr);

        switch (MEDIABAY_ID(x)) {
        case MEDIABAY_ID_NONE:
                DPRINTF("removed\n");
                if (sc->sc_content != NULL) {
                        config_detach(sc->sc_content, DETACH_FORCE);
                        DPRINTF("%s: detach done\n", sc->sc_dev.dv_xname);
                        sc->sc_content = NULL;

                        /* disable media-bay */
                        fcr = in32rb(sc->sc_fcr);
                        fcr &= ~(FCR_MEDIABAY_ENABLE |
                                 FCR_MEDIABAY_IDE_ENABLE |
                                 FCR_MEDIABAY_CD_POWER |
                                 FCR_MEDIABAY_FD_ENABLE);
                        out32rb(sc->sc_fcr, fcr);
                }
                break;
        case MEDIABAY_ID_FD:
                DPRINTF("FD inserted\n");
                break;
        case MEDIABAY_ID_CD:
                DPRINTF("CD inserted\n");

                if (sc->sc_content == NULL)
                        mediabay_attach_content(sc);
                break;
        default:
                printf("unknown event (0x%x)\n", x);
        }

        goto sleep;
}

/* PBG3: 0x7025X0c0 */
/* 2400: 0x0070X0a8 */